--- /dev/null
+From: Peter Michael Green <plugwash@raspbian.org>
+Date: Thu, 11 May 2023 20:32:47 +0000
+X-Dgit-Generated: 1:102.9.0-1~deb10u1+rpi1 9a72722b6b71861836cf59e664b3f994186a31fe
+Subject: Fix key error in media/libvpx/moz.build
+
+
+---
+
+--- thunderbird-102.9.0.orig/media/libvpx/moz.build
++++ thunderbird-102.9.0/media/libvpx/moz.build
+@@ -37,7 +37,7 @@ elif CONFIG['CPU_ARCH'] == 'x86':
+ else: # Android, Linux, BSDs, etc.
+ ASFLAGS += [ '-I%s/media/libvpx/config/linux/ia32/' % TOPSRCDIR ]
+ LOCAL_INCLUDES += [ '/media/libvpx/config/linux/ia32/' ]
+-elif CONFIG['CPU_ARCH'] == 'arm':
++elif (CONFIG['CPU_ARCH'] == 'arm') and ('ARM_EXPORTS' in files):
+ EXPORTS.vpx += files['ARM_EXPORTS']
+ ASFLAGS += [
+ '-I%s/media/libvpx/config/linux/arm/' % TOPSRCDIR,